Pump



May 22, 1928. "152L009 J. L. BODY PUMP Filed Aug. 27, 1926 3Sheets-Sheet .1 fly INVENTOR A'ILTORNEY May 22, 1928. 1,671,009

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INVENTOR ATTORNEY Patented May 22, 1928 UNITED- STATES PATENT JAMES L.BODY, OF NORWICH, ONTARIO, CANADA, ASSIGNOR OF ONE-FOURTH T0.

ALBERT. L. BUSHELL, OF NORWICH, CANADA. 1

PUMP.

Application filed August 27, 1926. Serial No. 132,004.

The object of this invention is to provide a pump including a cylinderextending thru the armature of a motor, and a piston. adapted formovement in the cylinder, incident to the rotation of the armature, withspecial means acting under predetermined air pressure to, open thecircuit of the motor.

A further object is toprovide a controlling device including anexpansible element, a pivoted arm controlled by the expansible elementand adapted to be positioned. in accordance with the position of apointer on a dial indicating the tire pressure desired, with specialmeans for throwing out the switch of the motor when the tire pressurecorresponds with the setting of the pointer on the dial. Y

A. further object-is to provide a pump especially adapted for use ininflating automobile tires.

With' the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements described,illustrated and claimed, 1t being understood that modifications may bemade within the scope of the claims Without departing from the spirit ofthe invention.

In the drawings formingpart of this application,

Figure 1 is a plan View, showing the housing, the dial thereon,.andmeans permitting the connection of the motor of Figures 2' and 3 withfeed wires. Figure 2 is a view in vertical section, the section being online 22 of Figure 1.

Figure 3 is a vertical section, on line 33 of Figure 2 Figure 4 is ahorizontal section on line 4-4 of Figure 2.

Figure 5 is a detail View, constituting a section on line 5-5 of Figure2.v

Mounted within the structure 10 are field coils 11 surrounding cores 12formed with the walls of structurelO, the field thus provided beingsuitably energized. The armature is designated 13 and includes the coilsRotating with the body of the armature is a sleeve 15, and anti-frictionbearings are shown as being located between the sleeve and the portions16 and 17 of the external structure, the bearings being designated 18.

Within sleeve 15 is a cylinder 20, and a piston 21 is adapted toreciprocate within the cylinder, a key 22 cooperating with key way 23permitting such longitudinal movement of the piston.

Piston 21 is elongated, and is provided with two annular end portions,and the body of the piston is provided with spirals 25 and 00 26extending in opposite directions, a dog 27 being adapted for cooperationwith these spiral channels,it being the intention that the piston shalltravel in one direction and shall then reverse, for producing thereciprocating movement referred to. Air is admitted at opposite ends ofthe cylinder 20 thru ports controlled by spring held valves 30 and 31,and air under pressure passes outwardly from the ends of the cylinder 20thru ports controlled by valves 32 and 33. The springs for the severalvalves just referred to are designated 34.

. Air placed under pressure by the plunger 21, and passing around valves32 and 33, passes thence to channels 36 and 37 commu nicating withchannel 38, from which air flows to the tire, or is otherwise made useof. A connection 39 is in communication with channel 38.

The pressure in channel 38 and in the tire affects an expansible element40 shown as having connection at 41 with said channel 38. Thisexpansible element 40 acts thru pin 42 on an arm 43 pivoted at 44 on thelower part of a pin 45 which is movable thru an aperture in element 46carried by housing 10. The vertical position of pin 45 is determined bya cam 47 acting upon cam ele= ment 48 mounting a pointer 49, the element48 being engaged by pin 45.

Arm 43, controlled in part automatically by the expansible element 40,may also be manually controlled by the pressure of the hand or thumb onthe element 50,

Arm 43 acting as a switch blade cooperates with the contact elements 52and 53, and is movable between these elements 52 and 53 when pressure isapplied at 50, this operation completing a circuit for starting the 109motor. In this connection, it may be stated that a motor of a difi'erenttype may be employed, if desired, but I have illustrated a form welladapted to serve the purpose. When pressure in the tire and in channel38 105 rises to a specified point, the expansible element 40 will raiseswitch arm 43 and will separate the portion 54 of the switch arm fromthe elements 52 and 53, as will be apparent from an inspection ofFigures 2 and 5..

Feed wires 58 and 59 are connected with separate terminals of a plug 60,one of these terminals being grounded, and one of the terminals of themotor being grounded as shown at 62 in Figures 1 and 3. The otherterminal of the plug is connected with wire 64, leading to the otherbrush 65 of the motor as in Figure 2.

Opposite the end portion 54 of the switch arm, reference being made toFigure 4, in connection with Figures 2 and 5, or approximately in thatposition is a stationary bracket 66 mounting the pivoted arm 67 carryinga pin or lug 68 adapted to be engaged by the switch blade 54, and arm 67carries an extension 69 having a depression formed therein forengagement by the end of a spring 70 mounted on an extension 71projecting from the side of the switch blade.

The elements just referred to having the relative proportions andposition indicated in Figure 2, the movement of arm 67 and the adjacentend of the switch blade will be accelerated, after element 67 passes adead or neutral point. The same quick movement will take place when theswitch blade is making contact with elements 52 and 53 and when thecircuit is broken at this point.

The pointer 49 is set at the desired point on a scale indicated bygraduations in F igure 1, and the position of the pointer determines thetime of operation of the switch releasing devices, so that the circuitwill be maintained until the air pressure rises to the point indicatedby the arm or pointer 49.

Movement of the pointer 49 in one direction, when setting the devicemanually for a given pressure, will produce mechanical pressure betweencam disk 48 and pin 45, tending to raise the left end 54 of lever 43,slightly, so-that it will disengage contacts 52, 53 (under the action ofexpansible element 40) sooner than when said pointer is shifted in theopposite direction in order to provide for increased air pressure in thetire,

by keeping themotor in operation longer.

Having described the invention, what is claimed is 1. In a device of theclass described, a motor including an armature, a cylinder extendingthru thearmature, a piston within the cylinder, means for reciprocatingthe piston incident to the rotation of the armature, for placing airunder pressure, an expansible element into which a. portion of the Lemmecompressed air passes, and a switch controlled by the expansibleelement, said switch being adapted for connection with the motorcircuit.

2. In a device of the class described, a motor including an armature, acylinder extending thru the armature, apiston within the cylinder, meansfor reciprocating the piston and automatically reversing its directionof movement incident to the rotation of the armature, for placing airunder pressure, an expansible element into which a portion of thecompressed air passes, and a switch controlled by the expansibleelement, said switch being adapted for connection with the motorcircuit.

3. In adevice'of the class described, a motor including an armature, acylinder extending thru the armature, a piston within the cylinder,means for reciprocating the piston incident to the rotation of thearmature, for placing air under pressure, an ex cylinder, means forreciprocating the f pijton incident to the rotation of the armature, forplacing air under pressure, an expansible element into which a portionof the compressed air passes, and a switch controlled by the expansibleelement, said switch being adapted for connection with the motorcircuit, and means manually controlled, and including a pointercooperating with a dial, for varying the time of effective operation ofthe expansible element with reference to the switch. p

5. In a device of the class described, a motor including an armature, acylinder extending thru the armature, a piston within the cylinder,means for reciprocating the piston incident to the rotation of thearmature, for placing air under pressure, an expansible element intowhich a portion of the compressed air passes, and a switch controlled bythe expansible element, said switch being adapted for connection withthe motor circuit, and means manually controlled, and including cammechanism, for varying the time of efiective operation of the expansibleelement with reference to the switch.

In testimony whereof I afilx my signature JAMES L. BODY.

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